Side by side

Formex Reef GMTvsGrand Seiko SBGM245

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Reef GMT
FormexReef GMT
MSRP $2,235
SBGM245
Grand SeikoSBGM245
MSRP $6,100

At a glance

10 of 29 specs differ
Diameter
Reef GMT42mm
SBGM24540.5mm
Power Reserve
Reef GMT56h
SBGM24572h
Water Resistance
Reef GMT300m
SBGM245200m
MSRP
Reef GMT$2,235
SBGM245$6,100

Full specifications

Case

5 specs
Diameter
42mm
40.5mm
Thickness
11.4mm
14.4mm
Lug-to-Lug
47mm
48.6mm
Lug Width
22mm
20mm
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW330-2
9S66
Power Reserve
56h
72h

Pricing

1 specs
MSRP
$2,235
$6,100

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

Grand Seiko SBGM245

Owners widely appreciate the Grand Seiko SBGM245 for its blend of sport and luxury, with one enthusiast highlighting its superior workmanship over quartz movements. However, opinions on its size vary, as one owner found the SBGM245 too large, preferring the comfort of a different variant. Overall, owners value the Grand Seiko SBGM245 for its refined craftsmanship, though its wearability is a point of personal preference.

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